4) A study of depression and exercise was conducted. A total of 5 groups were used: each group differs by the extent to which group members exercise. A depression rating (scale: 1-100, a continuous variable) was given to all 1215 participants in the sample. An incompleted ANOVA table is provided below. What is the obtained F (i.e., value in Cell [8])?
|
Sum of Squares |
df |
Mean Square |
F |
|
|
Between-Group |
[1] |
[2] |
[5] |
[8] |
|
Within-Group |
138 |
[3] |
[6] |
[9] |
|
Total |
220 |
[4] |
[7] |
[10] |
| A) | 179.82 |
| B) None provided |
| C) | 0.63 |
| D) | 113.26 |
| E)0.59 |
9) The figure below shows a normal distribution (black, dotted curve) and three tdistributions (red, green, and blue curves). Each t distribution is with a different degrees of freedom (df). Which one of the following statements is correct?
|
4) A study of depression and exercise was conducted. A total of 5 groups were used:...
Question 5 1 pts A study of depression and exercise was conducted. A total of 4 groups were used: each group differs by the extent to which group members exercise. A depression rating (scale: 1-100, a continuous variable) was given to all 1180 participants in the sample. An incompleted ANOVA table is provided below. What is the obtained F (ie, value in Cell [8])? Sum of Squares df Mean Square F Between-Group [1] [2] [5] Within-Group 142 [3] [6] Total...
Show details and explanation. Not just write down the
process.
Exercise 4 a. Find c such that c has the F distribution. b. What are the numerator and denominator degrees of freedom of the F distribution?
An experiment has a single factor with three groups and five values in each group. In determining the among-group variation, there are 2 degrees of freedom. In determining the within-group variation, there are 12 degrees of freedom. In determining the total variation, there are 14 degrees of freedom. Also, note that SSA 36, SSW 108, SST 144, MSA = 18, MSW 9, and FSTAT = 2. Complete parts (a) through (d). Click here to view page 1 of the F...
A study randomly assigned adult subjects to one of three exercise treatments: (1) a single long exercise period five days per week; (2) several ten-minute exercise periods five days per week; and (3) several ten-minute periods five days per week using a home treadmill. The study report contains the following summary statistics about weight loss (in kilograms) after six months of treatment: Treatment Mean Std. Dev. n Long periods 10.2 4.2 37 Multiple short periods 9.3 4.5 36 Multiple short...
5. Do you agree with the first three statements below? If yes, justify briefly. If not, correct it. For the last part, describe in a paragraph. If X is the mean of a random sample of size n froma population with the mean μ and the variance σ2, then its sampling distribution is a normal with the mean μ and the variance σ-, Agree Disagree If S2 is the variance of a random sample of size n taken from any...
A study that looked at beverage consumption used sample sizes that were much smaller than previous national surveys. One part of this study compared 20 children who were 7 to 10 years old with 5 who were 11 to 13. The younger children consumed an average of 8.2 oz of sweetened drinks per day while the older ones averaged 14.5 oz. The standard deviations were 10.9 oz and 8.2 oz respectively.Use younger children as population 1 (a) Do you think...
Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200 students in group 1 had a mean score of 25.5 with a standard deviation...
A study was conducted that measured the total brain volume (TBV) (in mm3) of patients that had schizophrenia and patients that are considered normal. Table #1 contains the TBV of the normal patients and Table #2 contains the TBV of schizophrenia patients ("SOCR data Oct2009," 2013). Table #1: Total Brain Volume (in mm3) of Normal Patients 1663407 1583940 1299470 1535137 1431890 1578698 1453510 1650348 1288971 1366346 1326402 1503005 1474790 1317156 1441045 1463498 1650207 1523045 1441636 1432033 1420416 1480171 1360810 1410213...
A researcher is interested in seeing if different study techniques can influence test scores. An experiment was designed in which students are randomly assigned to one of three groups based on how they study for a quiz. Group 1 simply reads the chapter, Group 2 reads and takes notes, Group 3 reads, takes notes, and uses a study guide. After each group studies, they take a quiz. Their quiz scores are listed below. Group 1 7 6 4 6 7...
A)The data were collected in a study conducted in a semiconductor manufacturing plant. In this plant the finished semiconductor is wire bonded to a frame. The goal of the study was to relate a pull strength to a wire length and a die height. The variables obtained for each subject were a pull strength (a measure of the amount of force required to break a bond), a wire length, and a height of a die. What is the type of...